Trev,

Unfortunately some of the more interesting pulse details are lost during 
the recording. I found that using the microphone input gave very poor 
results, using the line input was much better, if I can get one I will try 
a USB audio interface.
Regards
John


On Wednesday, March 12, 2014 9:39:18 PM UTC, Trev wrote:
>
> Very good recording John. Definitely has a persistent deep hum sound to it 
> and quite intrusive. 
> Are you planning on further work in this direction.
> it seems you have a way of extracting good audio at last
> Regards Trev
>
>
>

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